Key

Lowry Ii, Porter P., Haevermans, Thomas, Labat, Jean-Noël, Schatz, George E., Leroy, Jean-François & Wolf, Anne-Elizabeth, 2000, Endemic families of Madagascar. V. A synoptic revision of Eremolaena, Pentachlaena and Perrierodendron (Sarcolaenaceae), Adansonia (3) 22 (1), pp. 11-31 : 14

Key to the genera

1. Fruit indehiscent, subtended by an accrescent, entire involucre; ovary 2-carpellate ............ Perrierodendron

1’. Fruit dehiscent, the involucre accrescent or not, lobed; ovary 3-5-carpellate ................................................ 2

2. Sepals strongly unequal, the outer 2 much smaller; petals strongly contorted in bud; ovary 3-carpellate; ovules 2 per locule ................................................................................................................................ Eremolaena

2’. Sepals more or less equal in size; petals slightly contorted in bud; ovary 5-carpellate; ovules 4-6 per locule ...................................................................................................................................... Pentachlaena

In order to facilitate identification in Madagascar, the keys to the genera and species are also given in French.

Clé des genres

1. Fruit indéhiscent, entouré d’un involucre entier et accrescent; ovaire à 2 carpelles ............ Perrierodendron

1’. Fruit déhiscent, l’involucre accrescent ou non, lobé; ovaire à 3-5 carpelles ................................................ 2

2. Sépales très inégaux, les deux extérieurs plus petits; pétales nettement contortés dans le bouton floral; ovaire à 3 carpelles; 2 ovules par loge .................................................................................................. Eremolaena

2’. Sépales plus ou moins égaux; pétales légèrement contortés dans le bouton floral; ovaire à 5 carpelles; 4-6 ovules par loge ........................................................................................................................ Pentachlaena